Based on the proposed structure of a dripvalve, its operation principle was analyzed in detail. The theoretical opening pressure of the dripvalve was calculated. Then the simulation analysis to its flow field was completed with FLUENT after its 3D model was built. The contours of pressure and velocity of the dripvalve’〖KG-*2〗s flow field were gotten. It is shown that the structure of the dripvalve is reasonable and it can meet the design performance requirements.